It's definately related to the transmission. I'm using 93 shell-V also and have a K&N filter. After having the TSB done in May, the car was great, after the recall, it started out okay, with some shutter, st times, in 1st. I was hoping it would go away......it hasn't.

Wow, in that case I would head back to the dealership. I have the occasional hiccup, but it is few and far between.